Please describe the Swedish monoculture. Tell me why it wouldn't be dull. (I haven't heard too much good about the food.)
Then, tell me why you will stop living/keeping this monoculture now that all these "non-Swedes" are around.
And then, tell me how the monoculture is harmed when these "non-Swedes" start participating in it (as well as their own, adapted cultural heritages, at other times of the day).
Also, how long did it take previous immigrant groups to acculturate in Sweden?
What cultural qualities define "Swedishness", that is, qualities that are not found anywhere but in Sweden?
Evidence for mental retardation in immigrants to Sweden, please?
Evidence for permanent unemployment of immigrants to Sweden, please? Broken down country of origin? And distinguished from the benefits received by all Swedes (which from my American perspective seems to suggest that you all live on welfare to one degree or another)?
Which takes us back to the question of who counts as a Swede. It looks like you won't get a consensus on this.
They don't speak Swedish when talking to you? How odd.

Or do they speak English (for example) when talking
amongst each other?
What languages are they using, and do you have any reason to believe that their kids won't speak
both? (This is what usually happens with the second generation.)
Have you learned any of their languages? You might be good at it, seeing as how fluent you are in this foreign language.
What is the relationship between immigrant unemployment and employment discrimination in Sweden? What role is played by (potential) employers who have prejudices similar to yours?
In what year was that? And what is the relation of that year to the year in which you were born?